JList仅在此窗口中不触发任何鼠标事件。当前窗口（图 1）通过单击另一个可以在后台看到的窗口中的“编辑”按钮打开。
在“点名称”列中看到的下拉列表是用aJList添加并使用 显示的。在“点名称”列中输入的文本用作搜索字符串，与键入的文本匹配的项目列表显示在窗口中JPanelJScrollPaneJWindowJList
JList未触发鼠标事件的
窗口：
JList能够在其他窗口中触发鼠标事件。示例窗口如下所示。
JList能够触发鼠标事件的
窗口
JList仅当从另一个窗口打开当前窗口时才触发鼠标事件。否则它工作正常。
我已使用该getSource()方法查看触发事件的组件。对于图 2，事件源是JList。在图 1中，JList 没有触发任何鼠标事件
我有一个单独的类来处理整个窗口的鼠标和键事件。当单击下拉菜单或将鼠标移到图 1中的下拉菜单上时，不会调度任何事件。当鼠标单击图 1中的其他位置时，事件处理程序正在接收事件。
请帮我解决这个问题。
我正在扩展 DefaultCellEditor 并创建一个名为 SysCfgComboBoxEditor 的类，以将 Editable 组合框添加到表中。示例代码如下。代码很长，但我已经注释了其中的大部分。
public class SysCfgComboBoxEditor extends DefaultCellEditor{
Point MouseLocation1;
//The two vectors. One to hold all the items and other to hold filtered items
private Vector<String> vecAllPoints,vecFilteredPoints;
private int _window_Height;
private int _window_Width;
//Model for filtered list of items
DefaultComboBoxModel moel;
//Model for original list of items
DefaultComboBoxModel org;
//The JList for showing the filtered list of items
JList popUpItems = null;
Vector<String> matchingIndicies;
final JTextField textfield ;
protected JWindow window = null;
JScrollPane scrollPane = null;
private GraphicsConfiguration _gc = null;
JComboBox comboBox = null;
//The event handler for handling the events in the dropdown which displays filtered list of items
private transient PopupWindowHandlers m_popupHandler = null;
public SysCfgComboBoxEditor(Vector<String> vecPointNames, JComboBox cBox) {
super(cBox);
comboBox = cBox;
moel=new DefaultComboBoxModel();
comboBox.setModel(moel);
comboBox.setUI(new myComboUI());
comboBox.getActionMap().put("tab-action", myAction);
comboBox.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT)
.put(KeyStroke.getKeyStroke("TAB"), "tab-action");
moel.removeAllElements();
org = new DefaultComboBoxModel();
org.removeAllElements();
Iterator itr = vecPointNames.iterator();
while(itr.hasNext()){
Object obj=itr.next();
moel.addElement(obj);
org.addElement(obj);
}
this.vecAllPoints=vecPointNames;
((JComboBox) editorComponent).setEditable(true);
comboBox.setEditable(true);
matchingIndicies=new Vector<String>();
textfield = (JTextField) ((JComboBox) editorComponent).getEditor().getEditorComponent();
textfield.addKeyListener(new KeyAdapter() {
public void keyPressed(final KeyEvent ke) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
if(ke.getKeyCode()==KeyEvent.VK_DOWN || ke.getKeyCode()==KeyEvent.VK_UP ){
//display popup items and scroll
}
if(ke.getKeyCode()==KeyEvent.VK_ENTER){
//select popup items
}
if(!((ke.getKeyCode()==KeyEvent.VK_ENTER) ||(ke.getKeyCode()==KeyEvent.VK_TAB) )){
//getListModel() method filters the uitems and return a model with filtered list of items
DefaultListModel model = getListModel(textfield,false);
if(model != null)
//show the popup window with filtered list of items
showPopupWindow(textfield, true, model);
}
}
});
}
});
}
private void showPopupWindow(JTextField textField, boolean showTextInTextField,DefaultListModel model) {
if(comboBox.isPopupVisible())
comboBox.setPopupVisible(false);
if(window!=null){
// hidePopupWindow();
}
if (popUpItems == null)
{
popUpItems = new JList(model);
}
else
{
popUpItems.setModel(model);
}
this.addListeners();
if (window == null && popUpItems != null && popUpItems.getModel().getSize() > 0)
{
//this.initializeGraphicsConfiguration();
window = new JWindow(this.getComponent().getGraphicsConfiguration());
//window.setPreferredSize(null);
JPanel panel = new JPanel(new BorderLayout());
scrollPane = new JScrollPane(popUpItems);
//popUpItems.setPreferredSize(null);
//popUpItems.setUI(new myListUI());
scrollPane.setPreferredSize(null);
popUpItems.setBackground(this.getComponent().getBackground());
popUpItems.setFont(this.getComponent().getFont());
scrollPane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
panel.add(scrollPane, BorderLayout.CENTER);
//panel.add(popUpItems, BorderLayout.CENTER);
window.getContentPane().add(panel, BorderLayout.CENTER);
if (_window_Width > 0 && _window_Height > 0)
{
window.setSize(_window_Width, _window_Height);
}
else
{
if(model.getSize()>10){
window.setSize(this.getComponent().getWidth(),10*18);
}
else{
window.setSize(this.getComponent().getWidth(),model.getSize()*18);
}
}
Dimension popupSize = window.getSize();
window.setLocation(getPopupLocation(popupSize.width, popupSize.height, textField).getLocation());
if(MouseLocation1 != null){
if( window.getX() == 0 && window.getY() != 0 )
{
window.setLocation(MouseLocation1);
}
}
window.setVisible(true);
textfield.requestFocus(true);
}
}
public void addListeners() {
if (m_popupHandler == null)
{
//THe event handler is initialized
m_popupHandler = new PopupWindowHandlers(this);
}
}
//The inner class used as event handler for the dropdown
class PopupWindowHandlers extends FocusAdapter implements ChangeListener, AWTEventListener,
ComponentListener, WindowListener,KeyListener {
private Window _parentWindow;
private SysCfgComboBoxEditor _comboBoxEditor;
private boolean _isComponentResized = false;
boolean clicked = false;
public PopupWindowHandlers(SysCfgComboBoxEditor comboBox){
MenuSelectionManager msm = MenuSelectionManager.defaultManager();
msm.addChangeListener(this);
this._comboBoxEditor = comboBox;
addWindowListeners();
}
@SuppressWarnings({ "rawtypes", "unchecked" })
protected void addWindowListeners() {
java.security.AccessController.doPrivileged(new java.security.PrivilegedAction(){
public Object run()
{
Toolkit.getDefaultToolkit()
.addAWTEventListener(PopupWindowHandlers.this,
AWTEvent.MOUSE_EVENT_MASK |
AWTEvent.MOUSE_MOTION_EVENT_MASK |
AWTEvent.MOUSE_WHEEL_EVENT_MASK | AWTEvent.KEY_EVENT_MASK | AWTEvent.ACTION_EVENT_MASK);
return null;
}
});
Component invoker = _comboBoxEditor.getComponent();
_parentWindow = invoker instanceof Window ? (Window) invoker :
SwingUtilities.getWindowAncestor(invoker);
if (_parentWindow != null)
{
_parentWindow.addKeyListener(this);
_parentWindow.addComponentListener(this);
_parentWindow.addWindowListener(this);
_parentWindow.addFocusListener(this);
}
}
private void hidePopupWindow()
{
//hide the popup
}
@SuppressWarnings("unchecked")
protected void removeWindowListeners()
{
//remove the listeners
}
public void eventDispatched(AWTEvent ev)
{
//This event listener is not getting the mouse events from the JList.
if (ev instanceof MouseEvent && (SwingUtilities.isRightMouseButton( (MouseEvent) ev)
|| SwingUtilities.isMiddleMouseButton( (MouseEvent) ev)))
{
return;
}
if(_comboBoxEditor.window!=null && editorComponent.isShowing()){
MouseLocation1=_comboBoxEditor.window.getLocation();
}
switch (ev.getID())
{
case MouseEvent.MOUSE_PRESSED:
// do event
break;
case MouseEvent.MOUSE_CLICKED:
//do event
break;
case MouseEvent.MOUSE_MOVED:
//do event
case MouseEvent.MOUSE_DRAGGED:
//do event
case MouseEvent.MOUSE_RELEASED:
//do event
case KeyEvent.KEY_PRESSED:
//do event
}
}
}
private void mouseClicked(MouseEvent e)
{
//select the item
}
private void mouseEnteredOrMoved(MouseEvent e)
{
//scroll over the items
}
}